Screw-locking nut.



A. E. TERRY. SCREW LOCKING NUT. APPLICATION FILED DBO. 21, 1908.

Patented June 29, 1909.

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7fm 31/ Ye -7m UNITED STATES PATENT OFFICE. ALFRED J'IRNES'l T ERRY, OFEEEITOH, ENGLAND. SCREW-LOCKIN G NUT.

Specification of Letters Patent. Patented June 29, 1909. filed December 21, 1908. Serial No. 468,586.

Application T 0 all 207mm it may concern:

e it known that I, ALFRED ERNEST greater the bind1n E RRY, sub ect of the King of col upon the rovements in Screw-Locking Nuts, of whi h. the ollowing is a specification.

This invention relates to improvements in screw nuts, which the moved dotted lines), that increased in d' t iereby withdrawn, so that t e ordinary manner. e seen that because of the length 10, a pin inserted therein will be retained in place as by the resisting releasing pin is special make, inasmuch as any pin, peg, wire, or the like of a suitable size to pass down the hole 10 will answer the nuts may be unscrewed. 11 order to more clearly explain this my invention I have appended hereunto an illus trative sheet of drawings, figures and numbers of reference.

lgure l is a vertical sectional View of the 2, a plan view of the of th slightly unscrewing of the nut. n necessary that the end of th actually moved backward, but it is for the pin to hold the end of thecoll a advancement relatively latter is being unscre ed.

y placing the coil in the recess in the nut as shown, it is perfectly protected, and is also concealed from View, there unusual upon the external face t will be readil backward inorder to insure the easy Similar reference numerals are used for t e same parts in both figures.

drawing, 4 indicates a nut provided With the usual threaded opening 4* for a olt and a recess 5 in one end thereof, concentric with, but of greater diameter than said opening. lVithin said recess is placed a coil of wire 3 adapted to fit snugly into the screw threads of abo t 0 which the nut 4 may be fitted. preferably e coil shall be sufficient ainst e the of the nut.

is to unwind, and there tendency of the coil on the bolt to fore to loosen itself sutlicientl follow the nut, so that the nut can be readily which it is to screwed home,

made to unscrew the nut, the latter pulls the end 6 and therefore tightens the coil up the screwthread of the ho being am aware that it proposed to use i coils of Wire wit 1 screw nuts on I It movement of the nut, thereby prevented since the I do not claim the application of such being nothing 80 coils broadly, but only when adapted to be other end left free and overlying said hole, used with the hereinbefore described releassaid Wire 0011 being adapted to fit snugly in ing hole and pin or their equivalent, and the threads of a bolt when fitted to the nut What I claim is to clamp the same. 15 5 A look nut comprising a nut proper formed In testimony whereof I have hereunto set with a recess in one end larger than and conmy hand in presence of two subscribing Witcentric with the threaded opening in the nut nesses. and also provided witha hole extending in- Wardly from the bottom of said recess, an 1 0 a Wire coil in said recess having one of its ends ALFRED ERNEST TERRY. Witnesses:

J. BERNARD HAYWARD,

bent radially and secured to the nut and its H. GOODWIN. 

